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Exponentially Slow Heating in Short and Long-range Interacting Floquet Systems

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arxiv 1708.01620 v1 pith:CXT2PNQK submitted 2017-08-04 quant-ph cond-mat.quant-gascond-mat.stat-mechcond-mat.str-el

classification quant-phcond-mat.quant-gascond-mat.stat-mechcond-mat.str-el
keywords long-rangesystemsdynamicsinteractionsboundsexponentiallyfloquetheating
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abstract

We analyze the dynamics of periodically-driven (Floquet) Hamiltonians with short- and long-range interactions, finding clear evidence for a thermalization time, $\tau^*$, that increases exponentially with the drive frequency. We observe this behavior, both in systems with short-ranged interactions, where our results are consistent with rigorous bounds, and in systems with long-range interactions, where such bounds do not exist at present. Using a combination of heating and entanglement dynamics, we explicitly extract the effective energy scale controlling the rate of thermalization. Finally, we demonstrate that for times shorter than $\tau^*$, the dynamics of the system is well-approximated by evolution under a time-independent Hamiltonian $D_{\mathrm{eff}}$, for both short- and long-range interacting systems.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Prethermalization without temperature

    cond-mat.dis-nn 2019-08 conditional novelty 8.0 of 10

    An emergent approximate conservation of magnetization creates a long-lived prethermal time-crystal regime at infinite temperature, and tuning the drive field can exponentially extend the NMR time-crystal signal.

  2. Long-Range Prethermal Phases of Nonequilibrium Matter

    cond-mat.stat-mech 2019-08 conditional novelty 8.0 of 10

    The paper proves, with one explicit assumption in the intermediate regime, that prethermal Floquet phases exist for power-law interacting systems with exponent alpha > d, and predicts a disorder-free one-dimensional p...

  3. Locality and Heating in Periodically Driven, Power-law Interacting Systems

    quant-ph 2019-08 accept novelty 7.0 of 10

    Power-law interacting, periodically driven systems exhibit heating times exponential in drive frequency for alpha > D in linear response and alpha > 2D in general, with the gap attributed to the absence of tight Lieb-...

  4. Bosonic fractional quantum Hall states in driven optical lattices

    cond-mat.quant-gas 2019-08 conditional novelty 6.0 of 10

    For small bosonic samples in a driven optical lattice, stroboscopic dynamics supports the ν=1/2 Laughlin state for U/Jx=10 with ω/Jx≥20, and a slow ramp prepares it with high fidelity.

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